IRYAT SHMONA, Israel — As you drive toward the industrial park in this border town, you pass a disquieting sight: the abandoned skeleton of a thread factory that shuttered 18 years ago. Broken glass litters the concrete floor, and behind a door condemned with “NO PASSAGE” in red spray paint, huge canisters lean against one another like dead bodies.

It’s a foreboding omen of what could happen if the world’s largest generic drug manufacturer, Teva Pharmaceutical Industries, were to pull out of this northern Israeli city.

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